The cutting disc of the grinding machine is mounted on the grinding head and is driven to rotate by the motor. The reciprocating operation of the continuous casting billet is carried out on the platform, and the intermittent feeding motion is carried out by the grinding head to realize the lifting movement, and the surface of the entire continuous casting blank is repaired. Grind to eliminate surface defects. The temperature of the slab being ground is 20 to 700 ° C, the grinding depth is 0.5 to 2 mm, and the grinding line speed is constant at 80 m/s. The vibration of the working process is large, and problems such as equipment, installation, operation, and quality of the aluminum flat cutting disc can cause the failure of the cutting disc, causing certain damage to the person and equipment. 1 cutting disk failure After cutting the disc, the pieces of different sizes will fly out randomly, damaging the cutting plate and other surrounding facilities; at the same time, the unbalanced turning moment will be generated, causing huge equipment vibration, resulting in oil leakage of the grinding head and falling of the grinding head. The grinding head hanger positioning groove is torn, the cylinder pin shaft is loosened, the mainframe is cracked, etc., which seriously affects the normal operation of the grinding machine. 2 reasons analysis 2.1 Problems before cutting the machine on the disk 1) The quality of the cutting disc is poor. If the manufacturing quality of the cutting disc is poor, cracks are likely to occur during the working process, and a filming accident occurs. 2) Long storage time. The cutting disc adhesive has a certain period of validity, and the storage time of the cutting disc should not exceed 2 years. Since the purchase of the cutting disc at the beginning of the grinding machine is large, and a considerable number of cutting discs have been stored for more than the time limit, the probability of the cutting disc of this part of the cutting disc will increase significantly. 3) Storage is not standardized. The storage environment of the flat abrasive cutting disc should be kept dry, and the amount of water vapor around the water explosion pool on the spot is large; the water on the clamp of the crane is dripped under the running track to make moisture enter the cutting disc, forming a hidden danger. 4) Bumping in the process of on-site transportation will cause micro-cracks inside the cutting disc, which is prone to bursts.